Heating and ventilating apparatus



Jam m, ma; mama:

W- SHURTLE FF HEATING AND VENTILATTNG APBAI RATUS Filed Feb. 10 1922 Patented June 10, 1924.

WILFRED SHURTLEEF, OF MOLINE, ILLINOIS, ASSIGNOR TO MOLINE HEAT, OF MO'LINE, ILLINOIS, A CORPORATION OF. ILLINOIS.

HEATING AND VENTILA'IING APPARATUS.

Application filed February 10, 1922. Serial No. 535,625.

.' heating and ventilating apparatus, and more particularly to a unita device of the character described adapte to be installed in the room or space to be heated and ventilated, and referabl communicating directly with t e outsi e atmosphere thru an opening in the wall of the building, or thru a duct fitting within the window sash and occupying a portion of the window.

The object of the invention is to provide a suitable construction in a heating and ventilating unit,'whereby a portion of the' air passing thru the unit and discharged into the room is drawn directly from the room, thus being recirculated.

A further ob ect of the invention is to provide in a heating and ventilating unit a combination of dampers adapted to control the intake of air, thru a duct communicating with the outside atmosphere, and an inlet v 80 opening communicating with the inside air,

together with suitable operating mechanism whereby the dampers may be controlled simultaneously so that the proportion of outside and'insideair taken into the apparatus may be varied at will, or either one or.

the other intake 0 ings be entirely closed and the other open;

A preferable arrangement of the mechanism embodying the invention is disclosed in the drawing which represents a heating andventilating unit in vertical section, as installed adjacent the outside wall of aroom and receiving its supply of fresh air thru a duct plrojecting thru a window.

The eating and ventilating. unit com.- prises in general an upright housing or casmg 1, div1ded vertically into an upper blower chamber 2 and a lower heating chamber 3, there being a horizontal partition 4 separating these chambers. Within the blower chamber, and mounted upon the artition member 4, is a blower 5 having its ischarge opening-directed downwardly into the heating chamber and thru an opening in the as partition member ,4; Communicating, with mounted at the entrance of, the duct.

the blower chamber, and forming a part thereof, is a lateral duct 6 serving. as the fresh air inlet and adapted to fit snugly within the lower portion of a window opening, its entrance flush with the window sash 7, which rests upon the duct, as shown in the drawing. A screen '8 is preferably In the wall of the blower casing 9 is an inlet opening 10 located immediately in line with the air intake duct 6, and thru which the air is drawn into the blower and thence discharged downwardly into the heating chamber, as indicated by the 'iull line arrows in the figure.

Within the heating chamber 3 is mounted a heating element 11 in the form of aradiator, substantially filling the heating chamber from front to rear, said radiator being of the ordinary sectional construction, and provided with vertical passages between the sections. These vertical passages are further defined by a series of verticalfins 12 extending lengthwise of the radiator sections and spaced apart laterally. The heating element or radiator is further characterized by central vertical partition walls 13 extending between the sections and thruout the height of the radiator, thereby virtually dividing the passages thru the radiator into a down passage adjacent the rear wall of the houslng and directly below the blower discharge opening, and an up passage adjacent the front wall of the housing. These passages are readily identified by the arrows showing the path of the air therethru. The heating element. or radiator 11 is spaced above the bottom wall of the housing, and within the space therebeneath, is mounted a series of louvres 14 extending longitudinally of the 95 casing, and spaced apart edgewise, and further, arranged in the form of an arc,- following generally the direction of the air, in leaving'the down passage, and entering the up passage of the radiator These louvres form what is commonly termed the dust separator, which acts to remove the dust from the air, and depositing the same in the bottom of the housing. Above the radiator 11, and located in the front wall of the housing immediately below the part tion 4, is the air outlet opening 15 thru whlch. the heated air is discharged into the room. The discharge of air thru the outlet opening is controlled to $591 49 degree bya by-p m damper 16 mounted immediately adjacent to the discharge opening and adapted to control or regulate the portion of unheated air assing directly from the blower to the outet opening and the amount or air which circulates thru the radiator and thence out wardly thru the outlet opening.

The structure thus far described may be considered to be typical of heating and ventilating units to which the present invention is applicable.

Referring now to the air recirculating portion of the apparatus, there is located 1n the upper portion of the housing 1 an opening extending lengthwise of the housing; and

" thruout that portion immediately adjacent located on op osite sides of said passage.

will

horizontal axis.

Mounted within the upper portion of the blower chamber, and at some point inter- .mediate the end walls thereof, is a lever 20 having a shape approximating that of a crescent, and normally assuming an uprightposition. This lever is ivotally supported upon a rod 21 so that t e lever turns on a The point of pivotal support is substantially intermediate the ends of the lever, the upper end thereof curving rearwardly and toward the damper 18, and

having connection therewith thru the medium of a t l-shaped link 22 bent in a downwardly and rearwardly direction. The free end, of the link 22 is connected to the damper 18 adjacent the turning axis thereof. The lower end of the lever 20 is connected with a series of dam ers 23 arranged in vertically spaced relation within the horizontal air intake duct 6. These dampers 23 are adapted to be operated as a unit, and so are therefore connected together by an 3T1 rangement of transverse links 24 so that all dampers move simultaneously from open position, as indicated in full lines, wherein the several dampers occupy parallel p0 sitions, and into closed position, indicated by dotted lines, wherein the several dam era are swung into the same vertical plane, on-' meeting the uppermost damper with the lower end ofthe lever 20 is a'link 25 having an ofiset portion -intermediate its ends.

Anysuitable method may be applied for operating the lever 20, such,as a shaft extend- 111g inwardly from one end of the housing, and provided at its, innermost end with a crank 26 which engages a slot 27 in the i carnate.

lever immediately above and to the an of the point of pivotal support 21 as shown in the drawing. Mounted on the shaft exte rior to the/housing, may be a handle or other operating member for manually shifting the lever and the dampers operated thereby. As shown in the drawing, the air controlling dampers 18 and 24 (shown in full lines) are positioned so that the fresh air intake duct 6 is open and the recirculating opening is closed, thus providing for the air supply to the housing to be drawn entirely from the recirculating damper 18 is open. lln this position, the air supply to the blower chamher is drawn entirely from the air within the room, and is thus recirculated thru the heating and ventilating unit. Mani-festly, the dampers may be adjusted to intermediate positions so that the air suppl to the blower willbe part1 fresh air an partly recirculated air, an in a ratio depending on the relative degree of opening of the corresponding dampers.

The manipulation or regulation of the dampers would largely be determined by the weather conditions,'as well as by the air conditions within the room. As already suggested, and obviously,whenever possible, a constant su ply of fresh air from the out side is to be esired at all times. However, during extremely cold weather, or when the full capacity of fresh air is not regained, the

' supply of fresh air from the outsiuejmay be reduced or wholly shut oh, .andthe air withlnthe room recirculated thru the apparatus, either to be reheated or discharged into the room at substantially the same tem perature, depending on the position of the by-pass damper 18. I I

The addition of a recirculating feature to a heating and ventilating unit provides for more accurate regulation of the air and outside and inside atmo here demand.

Further, by operating both ampere by-single'mechanism, a definite ratio or, proportion of the air supplies is uniformly maintained,

ferred arrangement of the devicesoembody ing the invention, ll claim:

1. In a heating and ventilating can, the

combination of a blower chamber having a fresh airinlet duct, a recirculating inlet ar r nged at n angle to said fresh air inlet,

temperature conditions, as conditions ofthe and a discharge opening communicating with the space to be ventilated, dampers in said inlets, a bell crank lever mounted in said chamber, links connecting the ends of said lever with said dampers, and means for shifting said lever to control the proportic '1' of fresh and recirculated air entering said chamber through said inlets.

2. In a heating and ventilating unit, the combination of a blower chamber having a fresh air inlet duct in the outer vertical wall,

a recirculating opening in the top wall and I a discharge opening in the bottom wall,

proportion of fresh and recirculated air discharged through said discharge opening.

' In witness whereof, I hereunto subscribe my name this 6 day of February, A, D. 1922.

WILFRED SHURTLEFF. 

